Traveling grate



Aug 5, 1930. J. w. wRAY 1,772,299

TRAVELlNG GRATE Filed June 19, 1928 INVENTOR A TT ORNE YS' s", M50issued November 15, 1927.

Patented Aug. 5, 1930 ff;

.IoiINy WILLIAM: Wiesn on FINoHLEm,LoNnoN,nNGLNn, "AssIG'NoR;rog-yIN'Ijnnj- NATIONAL coMBUsTIoN ENGINEERING oonroBA'rIoNonNnWYo1aK,1N.,Y.,aggonT pPoNATIoN oFi131211:.nvmnna f f f Tbislinv-ention'relatestomeolianiea'l stolers `of the traveling grate type and'particularly to'itfhe ,typen of vstoker in -vvhibh `the :girate barsvlare supported by means Vof. anendless carrying 5 Achain.

"` Referring toly Figsfland; the Stoker 'confrprises 'a pluralityr Ofparallel y'ericlleis Chains eae'lf of 4which iis, 'made up yofplurz'ilityI of 'supporting links ","connctely shortV '6.V The links 5carry spindles'fjwbieh arden,- fcireledby tbe sleeves whichextendbetvveen adjacent chains. Rollers 9Twhichfare` vsecured "to 'they'sleeves 8 l travel overv #revolving Edrums j (fnoll;` Shovvnl fat eacliendl "of the stoker ,and `over"suitable intermediate "supportss'hofvvnyinaknown manner, tliegratelis thusslipporte'd inoperation.

l(Sl-rate fba-r` `carriers 10711;` are,y also Secured to the supportinglinks 5vl by means :of Abolts um.. 12, and,l a :group olf-grate bars 13issnpported Y at one vendinfeaoh. earrier lOlanld at, tbefothjer end bya corresponding carrier 1l, fon ythemext chain? t A :"x if "mill" nlm"f,

The Carriers 10 land 11 (See-Eis:- 4)fhave F70 dovvnvvardlyprojectingluglportions :lll which passthrouglifboltboles215m;ref; f,lEachcarrierlOalso-has a'number'of-,lioles 16 whichextendi .tbr'ughitand; provide bear- -ingsj inthe :carrier :for `the"tiunnion's 172 of"'the zgr'ate'rbars 13. f The: upper portion of eaeb "carrier 1Q is *alsoprovided :omea'clr 'side with slots-718 which open into tbeupper partofftbe holes v116 1 for a `purpose to be'y hereinafter* nions 17 form apivotal-support for the grate at each end which engages the carriers 10and That portion of theigrat'e I .barsfvvhieh blies `between thevshoulders 19" andgthe trunnions 1.7 comprises an upper Shoulder,2Q-(See Fie 2i) ,mld` thnnera web portion 21". The- Shoulder 20 is ofthe same thikness sasiadjliCfll-l POI- \95 v4:tiens oilthe effet@ bemandis wider .them-the slots? 18 theearrier 10, but `the web 21 is when thegrate bar is at substantially right angles to the carrier.

With the grate bar in this position, it will be seen that the web 21 ofa bar will register' with the slot 18 of the carrier.

In order toy remove one of the bars 13, the adjacent` bars which arecarried in the opposite side of the carrier 10 (those to the left inFig. 1, for example) are placed in the positieni shown in Fig. `2 inorder to permit the shoulder 19 of the bar which is to be removed toclear the shoulders of the others. The bar which isI to be removed isthen turned to a position at right angles to the carrier so that the web21 will register with and enter the slot 18 and the bar isy then slid`toward they carrier 10. The depth ofthe slot.18is suiiicient to permitthe bar 13 to be` moved enough to allow the trunnion 17 on the oppositeend thereof to clear the carrier 11. The grate bar isthen tilted up.until thebottoxnwill clear the carrier 11 and then the trunnion17 may beslid outoil the carrier 10 andthe bar removed. The central bar in Fig. 1is shown in aposition with the web in the. slot at the left and thetrunnion 17 at the right clear of thecarrier 11. The trunnionvof thelgratebar itsloosely into the slotted carrierin order to permit of thetilting described. y

VThe normal space between abutting trunnions is, of course, suiii'cientto allow any bar tov be removed.

At this pointit should also be noted that it is only necessary toprovide alternate chains with-carriers 10, carriers 1 1, without slots,being used on the other chains.

Theshoulder 20 of each bar will engage the carrier to prevent lateralmovementv of the bar, except when itA is at substantially rightangles'to the carrier; Thelbaris insuch position relative to thecarrier,in normal operation only at such'times (i. e., when passing over a'ldrum) as it isin movement in turning trom one position' to another,and'y it is extremelyunlikely that the web would enter the slot when thebar is turning. Furthermore, the shoulders 19 of the bars normally abutthe shoulders ofthe bars carried in the opposite side of theIsame-carrier, and this alsoY prevents any undesired' lateral' movement;

In theconstruction illustrated; in Fig. 3, the parts are the'same' as inthe other construction, with theA exception ofY the grate bar 13andpcarrier 10.

y In' Fig.V 3 it is the gra-te bar' which is slotted" as at 22 and thecarrier 10 has no slots. The removal of the bar is effected"V just as inthe construction, of F igs., 1 and 2'...

It will be seen from the above that there is nonecessi'ty of movingJ thestolerftoany particular position to effect a removalof any har and thatlthe bars may be removed and replaced quickly and without the use ofspecial tools.

1. A traveling grate construction including a plurality of grate barcarriers, removable grate bars pivotally supported by the said carriersvand slots in one of the carriers, the grate bars having web portionswhich are thin enough to enter the slots to permit lateral movement ofthe grate bars toward such carrier.

2. A traveling grate construction including'a plurality of grate barcarriers, removable grate bars extending between and pivotally supportedin said carriers, slots in one of the carriers, the grate bars havingWeb portions which are thin enough to entersaid slots topermit lateralmovement of the grate bars toward such carrier, and shoulders on thegrate bars which normally engage the said carrier to preventlateralmovement of said bars.

3. A; traveling grate construction including a plurality of removablegrate bar members which are pivotally mounted at each end in a carriermember, a slot in one of said members into which the other may enterwhen. the members are in predetermined angular relation, and meanspreventing such entering when the members Vare in any other angularrelation.

4;. A traveling grate construction including a plurality of removablegrate bar mem` bers which are pivotally mountedv at each end in acarrier member, a slot in one of said members into which the other mayenter when the members are inpredetermined' an gu-lar relation, and ashoulder on one of said 'membersy whichengages the other member`toprevent such entering, whenthe members are in anyv other angularrelation.v

5. A travelingA grate construction including a plurality of removablegrate bar members vwhich are pivotally mounted at each end in a carriermember, a slotvin one of said members into which the otherV may enterwhen the members are.. in predetermined angular relation whereby thegrate bar may be moved laterally a sufficient distance to disengage theopposite end of the bar from` its carrier.

6:. A traveling grate,constructionincluding` apluralit)ZV of removablegrate bar mem,- bers, a carrier member for each4 endy of the saidgratebar, members, each carrier member having an opening into which the baris pivoted, a slot in one, of saidmembers. into which the other mayenterv when the members are in predetermined. angular relation wherebythe gratevbar maybe moved laterally a suiiicient. distance to disengagethe 0pposite vend, of the bar from its carrier, the 'openingl in theother carrier being sufficiently large. toV permit tilting of the barkwhen so disengaged'.

l may be moved laterally when in a certain predetermined relation with acarrier, and shoulders on said bars which normally abut bars of anadjacent group to prevent lateral movement thereof, the bars of onegroup being movable to permit lateral movement of any bar of an adjacentgroup.

9. A traveling grate construction ineluding a plurality of groups vofremovable grate bar members which are pivotally mounted end to end invgrate bar carriers and which may be moved laterally when in a certainpredetermined relation with a carrier, the ends of the bars of one groupnormally abutting ends of bars of an adjacent group to prevent lateralmovement thereof, the bars of one group being movable topermit lateralmovement of any bar of an adjacent group.

In testimony whereof I have hereunto signed my name.

JOHN -WILLIAM WRAY.

